3D model of a gigantic ruin built of irregular blocks of aged stone stained with moss. Rough limestone walls with cracks, moldy wooden rafters. Collapsed light gray walls with moss traces. Entire roof collapsed into damp, dirty rooms. Slate tiles floor outside looking precarious, moss stains. Moldy wood details on collapsed columns, visible grain. Ancient scene, J.R. Tolkien, Game Dev, unreal 3D render, ZBrush, photogrammetry, fine details, accurate proportions. 4k realism.